/*
    容器组件
*/
// 引入connect用于连接UI组件与redux
import React, { Component } from 'react'
import { connect } from 'react-redux'
import { increment, decrement, incrementAsync } from '../../redux/actions/count'

// 定义UI组件
class Count extends Component {
  state = {}
  // 加法
  increment = () => {
    const { value } = this.selectNumber
    this.props.increment(Number(value))
  }
  decrement = () => {
    const { value } = this.selectNumber
    this.props.decrement(Number(value))
  }
  // 奇数再加
  incrementIfOdd = () => {
    const { value } = this.selectNumber
    if (this.props.count % 2 !== 0) {
      this.props.increment(Number(value))
    }
  }
  // 异步加
  incrementAsync = () => {
    const { value } = this.selectNumber
    this.props.incrementAsync(Number(value), 500)
  }
  render() {
    console.log('ui', this.props)
    return (
      <>
        <h1>
          当前求和为: {this.props.count}下方总人数为{this.props.persons}
        </h1>
        <hr></hr>
        <select ref={(c) => (this.selectNumber = c)}>
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
        </select>
        &nbsp;
        <button onClick={this.increment}>+</button>&nbsp;
        <button onClick={this.decrement}>-</button>&nbsp;
        <button onClick={this.incrementIfOdd}>当前求和为奇数再加</button>&nbsp;
        <button onClick={this.incrementAsync}>异步加</button>&nbsp;
      </>
    )
  }
}

// 使用connect()()创建并暴露一个Count的容器组件
export default connect(
  (state) => ({ count: state.count, persons: state.persons.length }),
  // mapDispatchToProps的一般写法
  // dispatch => ({
  //     // 通知redux执行加法
  //   jia: number => dispatch(createIncrementAction(number)),
  //   jian: number => dispatch(createDecrementAction(number)),
  //   jiaAsync: (number, time) => dispatch(createIncrementAsyncAction(number,time)),
  // })

  // mapDispatchToProps的简写
  {
    increment,
    decrement,
    incrementAsync,
  }
)(Count)
